I dont recommend anyone turning off chat before the game even starts. However, i completely understand why it is that you decided in doing so. This game just slowly eats away your mentality after each round of league (well TFT is the exception uwu). I always believe that with proper communication and coordination (and other variables), you can win or lose without being too heated. Unfortunately there are players can bring unwarranted toxicity into our games. I cant even blame them since they might have started out not being toxic, but then other people just ruined the game for them. But I digress. While again I would not recommend turning off all chat (both your team's chat and the enemy), I would ever so slightly consider trying one or two games without it on. As much as I love both Riot Games and the community, they can be the very reason that you'd ever realistically drop this game.